Inside burr removing apparatus



Dec 26, 1950 w. s. scHAEFER ErAL 2,535,553

INSIDE BURR REMOVING APPARATUS Dec. 26, 1950 w. s. scHAl-:FER ETAL 2,535,653

INSIDE BURR REMOVING APPARATUS 2 Sheets-Sheet 2 Filed Jan. 9, 1946 INVENTORS WA TEE S-SCHAEFE Y& THOMAS M. BOWES.

ATTORNEYS Patented Dec. 26, 1950 INSIDE BURR REMovING APPARATUS lllhilter;Y S.` Schaefer, Euclid, and Thomasy M., Bowes, South Euclid, Ohio, assignors to. Republicv Steel Corporation, Cleveland, Ohio, a corporation of. N ew Jersey Application January 9, 1946, Serial No. 640,124-

(Cl.y 90--2421 1. Claim. l.

This invention; relates generally to the art of removing Welding burrs from the inner surface of longitudinally' Welded tubular metal articles, and is particularly concerned with nenr apparatus for removing such burrs.

The prior burr removers comprised a plug with rollers which projected on opposite sides thereof and which in some instances were capable of moving relatively to an extent suine-lent to eom pensate for slight variations in the inside diameter of thewelded article. However, these burr removers were not capable of being adjusted to accommodate differentA sizes of Welded articles and, as a result, burr removers were provided for each of the different' sizes of the welded articles. This meant that a considerable number of burr removers. diering only from one another in small diametrical dimensions, had to be carried in stock when Welded articles of a variety of different inside diameter sizes were being made.

Furthermore, these pror burr removers were not susceptible to adjustment of the burr cutting tool while the burr remover Was in the article to be Welded. Frequently it Was necessary to adjust the cutting tool as, for example, When the seam was not properly Welded or the cutting tool was not removing the proper amount of metal from the inside of the article. Any such adjustment of the cutting tool necessitated the removal of the article to expose the burr remover and permit adjustment of the cutting tool by affording access to the trailingr end of the burr remover, where the tool adiusting means extended longitudinally of the burr remover.

According to the present invention we have provided a burr remover which can be adjusted to accommodate Welded articles of a `range of different inside diameters and can also be adjusted as regards the cutting tool and both adjustments mav be made thru the open seam cleft of the article to be welded without removing the article from its positionsurrounding the burr remover.

In the drawings which accompany and form a part of this specification,

Figure 1 is a top plan view of one form of a burr remover embodying the present invention;

Figure 2 is a central, longitudinal, sectional view of the apparatus of Fig. 1, taken on line 2-2 thereof;

Figure 3 is a transverse sectional View taken on line 3-3 of Fig. 2;

Figure 4 is a top plan view of another form of apparatus embodying the present invention;

Figure 5 is a central, longitudinal, sectional 2; I View of the apparatus taken on line 5--5 ot Fig.` 4; and

Figure 6 is a transverse sectional View taken on line 66 of Fig. 5.

In- Figs. 1, 2 and 3? the burr remover comprises aplug I' having a plurality of slots 2, 3` and 4` spaced apart. axially therealong. Piu-g I` is shown in operative position Within a longitudinally Welded metal tube 5' in Figs. 2lA and 3;.`

Rollers E are mounted on nxed axles I which extend transversely of plug I andare disposed in slots 2 and 3 or the plug. A` carriage 8: is;1 dis.-V posed in part of sot 3: and is pivotally mounted-l on nxed. axle' 9 which extends transversely of the plug. The carriage 8 carries a xed axle Ill on which is rotatably mounted a. roller II., .A bendable member I5, shown here asa spring rod', is loosely ntted into a recess IB in the` free endof the carriage 8. The other end of member I 5 may` be similarly loosely fitted into a recess IIT in plug l. An abutment I8 in the form. of a headless` screw is threaded transversely into plug i and` recess I1'!,.where it engages the end of mem,- ber I5. Another headless screw I9 is threaded transversely thru plug I: and bears against member I5 at a point between its ends.

It will be noted that rollers 5 project` beyond one side of plug I and are circumferentially recessed as at 2li to straddle the welding burr 2| and engage the inner surface oi the Welded article 5 on both sides-of the burr. It will also be noted that roller II projects beyond the opposite side of plug I and that screws I3 and it extend inwardly of the plug from the side thru which rollers IS project.

It will be understood that when screw Ill is screwed inwardly against member I5 it :may deflect or bend the latter and pivot carriage il about axle S and thereby vary the extent of projection of roller II beyond the surface of the plucr obposite to thatthru which rollers 5 project. When screw I9 is screwed inwardly against member I5 so as tocause roller II to extend further beyond the surface of the plug I, the plug will accommodate welded articles of larger inside diameter. The spring action of the bendable member I5 allows the plug to accommodate itself to small differences in the inside diameter of the welded article. Pressure applied against roller i I tending to reduce the extent of its projection beyond the side of plug I, will result in deflection of member I5 and movement of roller I I inwardly of plug I. In this case member I5 bends about recess I'I and screw I9. Abutment screw I8 prevents endwise movement of member l5 in recess l1. Near the end of plug a cutting tool is located in slot 4. This tool has a cutting edge portion 26 of suitable composition at its forward end and has side recesses 2l which engagingly receive opposed shoulders 28. It will be understood that the tool 25 may be located at different positions along these shoulders. The trailing portion 29 of tool 25 has a longitudinally extending threaded recess 36 into which a threaded bolt 3| extends. bolt bears against the trailing end surface 33 of plug while the shank of the bolt lies in opentopped slot 34 of the plug. By tightening bolt 3| tool 25 may be held in predetermined position by shoulders 28 and bolt 3|. A headless screw 35 is threaded in an opening extending thru tool 25 from the side of the apparatus opposed to the welding burr and at the inner end bears against the longitudinally projecting portion 36 of plug The leading end of tool 25 is spaced rearwardly of the forward end of slot 4 and, together with the walls of that slot, denes a space thru which removed welding burr 3l may pass thru the plug.

Since screw i9v is accessible thru the open seam cleft of welded article the extent of projection of roller beyond the side of plug i may be adjusted while the plug is in an unwelded article. Since screw 35 is similarly accessible' thru the open seam cleft of article 5, it may be adjusted to increase or decrease the depth of cut made by the cutting edge portion 26 of tool 25, it being understood that before such an adjustment is made bolt 3| is rotated to loosen the tool and after the adjustment is made the screw 3i is tightened to hold the tool in its adjusted position relative to shoulders 28.

Figs. 4, 5 and 6 show burr removing apparatus similar in many respects to that shown in Figs. 1, 2 and 3. In these figures parts similar to those shown in Figs. 1, 2 and 3 are similarly numbered and from this fact it will be understood that the foregoing description of those parts applies to. these parts of Figs. 4, 5 and 6.

A cutting tool is located in slot 4 near the trailing end of plug and is provided with a cutting edge 46 of any suitable material. Trailing end portion 4'1 of tool 46 extends beneath portion 48 of plug A socket-headed cap screw 49 extends thru an opening in portion 48 and into a screw threaded hole 50 in portion 41 of the cutting tool. Two headless screws 5| have screw threaded engagement in holes of portion 48 of plug and at their inner ends engage the top surface of portion 4l of the tool. Adjustment of tool 45 transversely of plug to vary the extent of projection of cutting edge 46 beyond the adjacent side of the plug may be readily accomplished thru the open seam cleft of a tubular article by adjusting screws 49 and 5|. When it is desired to increase the amount of such projection socket screw 49 is loosened and screws 5| are backed out, after which screw 48 The head 32 of this Jscrews 5|.

is tightened and brings tool 45 into contact with When the extent of projection of the tool is to be decreased, screws 49 and 5| are loosened, screws 5| are advanced into the plug and then screw 49 is tightened.

In the apparatus of Figs. 4, 5 and 6, as in the apparatus of Figs. l, 2 and 3, a passage is provided in slot 4 for movement of the severed burr metal 31 through the plug.

The plugs of Figs. 1, 2, 4 and 5 are provided with means at their leading ends for attachment to an anchorage. This means includes a slot 55 at the leading ends of the plugs and holes 56 thru which a pin may extend thru the plug and thru anchors in slots 55. As the drawings show, the illustrated burr removing apparatus is substantial in construction, consists of a small number of parts which are inexpensive to make and maintain, and are adjustable thru the open seam cleft of a tubular article both as regards the overall inside diameter of tubing with which they may be used and also as regards the depth of cut which may be made by the cutting tool.

Having thus described our invention so that others skilled in the art may be able to understand and practice the same, we state that what we desire to 'secure by Letters Patent is dened in what is claimed.

What is claimed is:

Apparatus for removing welding burr from the inner surfe ce ci' a longitudinally wel-ded. tubular, metal article comprising a plug, a plurality of axially spaced rollers in the plug, each projecting beyond one side of the plug to engage the article on both sides of the welded burr, a carriage in the plug between said rollers and pivotally connected at one end to said nlug, a roller in said carriage projecting beyond the opposite side of said plug to engage the article opposite said burr, and means for varying the extent of projection of said roller including a bendable spring rod extending longitudinally of said plug with its ends projecting into recesses in the carriage and plug. and adjustable means extending transversely of the plug from the side thereof adjacent to the welding burr and engageable with said bendable rod between its ends for bending the rod and moving the carriage roller outwardly to a predetermined fixed position or permitting the rod to bend and move said roller inwardly.

WALTER S. SCHAEFER. THOMAS M. BOWES.

REFERENCES CITED The following references are of record in the i'lle of this patent:

UNITED STATES PATENTS Number Name Date 2,053,831 Jenkins Sept. 8, 1936 2,286,513 Sower June 16, 1942 

